Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Patent
1988-08-03
1990-04-24
Oberleitner, Robert J.
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
25112902, 25112921, 25112905, B60T 836, F16K 3102
Patent
active
049194976
ABSTRACT:
A magnetic valve with reversible flow for use in anti-skid brake systems (ABS) has an armature displaceably supported in a valve housing within a control coil. A sealing element is moved by the armature and a stationary valve seat is associated with the sealing element. The armature includes a bottom which communicates via openings with an inflow region including the sealing element, a sealing element holder, and a valve body. The sealing element formed as a sealing ball and the sealing element holder formed as a perforated disk are embodied such that within predetermined stroke and flow ranges, an aspiration effect due to the flowing medium ensues, and a retaining element provided in the form of a permanent magnet acts upon the armature and the retaining element is overcome upon electrical triggering of the magnetic valve, resulting in a large flow cross section for normal braking, and a reduced flow cross section in ABS operation.
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"Tests of Electrohydraulic Switching Valves with Fluidic Ball Elements", German Aeronautics and Space Travel, Research Report 73-35.
Greigg Edwin E.
Newholm Timothy
Oberleitner Robert J.
Robert & Bosch GmbH
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